Dealing with Predictability If we look at the distributions we see that plan 2 hits 80% of all plans(all execution patterns)with a cost of 31.9. Plan 1 only hits 80% of all plans at a cost of 33.5 0.8 0.7 --..Plan 1 0.6 Plan 2 Execution Cost Figure 2 Probability Density Function for Execution CostDealing with Predictability ◼ If we look at the distributions, we see that Plan 2 hits 80% of all plans (all execution patterns) with a cost of 31.9. Plan 1 only hits 80% of all plans at a cost of 33.5